sakai

Sakai CLE (Collaboration and Learning Environment) is a free, open-source software suite designed for learning, teaching, research, and collaboration in educational institutions. It is an Apereo Foundation project with a diverse global community of adopters. Key features include a comprehensive set of tools for course management, communication (messaging, forums), assessments, resource sharing, and collaboration. The platform supports skinning for customization and has translations available in numerous languages including English, Spanish, French, German, Japanese, Chinese, Arabic, and many others. The master branch represents Sakai 24, with additional branches for supported releases. Sakai requires Java 1.8+ and runs on Apache Tomcat 9. Community-supported versions include Sakai 25.2 and 23.5, while previous versions like 22.5, 21.5, and older are maintained only for security fixes. Sakai emphasizes accessibility, with VPAT reports documenting conformance, and offers an open-source CKEditor Accessibility Checker for content inspection. Additional community-contributed tools are available at the sakaicontrib GitHub organization. Licensed under the Educational Community License v2.0, Sakai provides bug tracking through Jira, nightly test builds, and community support via mailing lists and Slack.